Radiator-core



J. M. FE-DDERS.

RADIATOR CORE.

APPLICATION FILED APR. 5. 1916.

Patented Jan. 20, 1920.

2 SHEETS-SHEET 2.

ATTORNEYS IINITED STATES PATENT J'OHNM. FEDDEBS, OF BUFFALO, NEW YORK,'ASS'IGNOR TO FEDDERS MANUFACTURING COMPANY INQ, OF BUFFALO, NEW YORK, A= CORPORATION OF NEW YORK.

nenmron coan To all whom it may concern:

Beit known that 1, JOHN M. FEDDERS, acitizen of the United States, residing at Buffalo, in the county of Erie and Stateof New York, have invented new and useful Improvements in Radiator-Cores, of which the following is a specification,

This invention relates to the cores of cellular radiators which are more particularly used for cooling the water of gas engines and in which the walls 'of the water tubes. and the radiating fins between said walls are constructed of corrugatedv strips of sheet metal. 1 r

' It isthe object of this invention to provide a core for radiators of this character with simple, efficient and superior means which hold the several strips of a core in their proper assembled position relatively to each other preparatoryto permanently connecting the same by soldering and in which the radiating fins are stiflened and capable of being produced uniformly and economically and without distortion of the metal.

In the accompanying drawings: Figure 1 is a fragmentary front elevation; partly in section, of a radiator core constructed in' accordance with my invention, the section being taken on line 1-1, Fign. Fig. 2-

is a fragmentary perspective view of one'of .the strips or sections of the radiator forming one wall of awater tube. Fig. 3 is asimilar view of one of the stripsv forming one of the radiating fins; Fig. 4 is ahorizgntal section taken on line 4-4, Fig. 1. F g. 5 is a fragmentary section taken on 1ine"55, Fig. 4. \Fig. 6 is a'viewsimilar to Fig. 5 but showing tworadiating; fins or strips between adjacent water .tubesp Similar characters of reference indicate corresponding parts throughout the several views. 4 v

In its general organization my improved radiator comprises a pluralityof water tubes 1 which are of zig-zag or serpentine form and a plurality of air tubes 2 which are arranged at rightangles to the water tubes and operate to conduct the air past the exterior of the water tubes for the purpose of cooling or changing the temperature of the water or other liquid which is passing through the tubes 1. As shown in the drawings the water tubes are arranged vertically and the air tubes horizontally, but any other arrangement of these conduits Specification 51 Letters Patent. Patented J an. 20, 1920. Application filed April 5, 1910. 'Serial No. saoso.

may be employed, if desired. In the completed radiator the upper and lower ends of the water tubes are connected with upper and lower water headers or boxes in the usual and well known manner;

The several water tubes and air tubes are constructed of a plurality of corrugated strips of metal which are so assembled that two or more vertical rows or tiers of air tubes are formed between two adjacent water tubes, two of such strips i beingemployed to form the walls of each water'tube and one or more additional stifips 5, being used toform one or more radiating fins or webs between the opposing walls of two waterjtubes to produce therewith two or more tiers of air tubes. In the example shown in the preferred form in the draw i gs. two tiers of air tubes are formed be-' tween every two adjacent water tubes but this number may be varied as desired.

Each of the walls of the water tube and each of the radiating fins forming part of a tier of air tubes is constructed of a single strip of metal,.p'referably copper or an alloy thereof and so shaped that thesame is providedwith a, longitudinal row of transverse corrugations 6" giving the'strip a zig-zag form in thedirection of its length. I The summits 7 of the corrugations on one side of each water tube strip extend uniformly or continuously from one .longitudinaledge thereof to its other longitudinaledge while the summits of the corrugations on the opf posite side of each of these strips 'have'a ereceding centralv part'Sand laterally ofl"-set end portions 9, 9 at the opplisite longitudinal edges of the strip. The continuous summits .of the corrugations on onexside of the strip and the off-set portlons ofxthe summits on the opposite side of the corrugations of each water tubevstrip are preferably flattened so thatthey are parallel with the length of the strip as a whole, as shown in Figs. 1, 2 and 5.

throughout their length while the intermer i p 100 In forming each water tube the stri ,s coni 'stituting the walls thereof are assem led so diate parts of these wall strips are separated and thereby form a conduit for the passage of the water through the same. The connection between the opposite longitudinal edges of the wall strips of the tubes is effected by soldering the same in the usual and well known manner.

Each radiating strip is so formed that the summits 10 of its corrugations are continuous from edge to edge of the strip; and preferably flattened in the same manner as the strips forming the water tube walls.

The strips constituting the radiating fins or webs between .adjacent water tubes and forming the air tubes in connection with the opposing walls of'the water tubes may be assembled in various ways. As shown in Figs. 1 and 4, each pair of radiating fins between adjacent water tubes is assembled so that each of these fin strips engages the convex sides of its summits on one side of the corrugations thereof with the continuoustube wall strips and retaining these members in this'position until they are soldered or otherwise secured together a plurality of centering loops 11 is provided on each fin strip and ada ted to interlock with the adjacent strip. s shown in the drawings each fin stri as a plurality of rows of centering loops ormed thereon so that a pair of the same project laterally from alternate concave faces of said corrugations and the loops of a row on one side of the strip alternating with and also staggered relatively to the lo'opsm a row on the opposite side of the respective strip, as shown in Fig. 3.

In the assembled position of a .wall strip and a fin strip the centering loops on the fin strip engage. with the concave faces of an adjacent strip, for instance, in the case "of the constructlon shown in the drawings the centering: loops on one side-of each fin strlp engage with the concave faces of one adjacent wall strip and the centering loops on -the opposite side of the respective fin strip engage with the concave faces of another adjacent wall strip. By this means the several wall and fin strips may be quickly assembled and held in their proper relative position until they are permanently connected. Each of the centering loops is of substantially .the same form in cross section as the cross section of the corrugations of the wall'strips and fin strips so that these loops engage fully with the concave faces on the adjacent strip and do not obstruct the air passage through the same, thereby permitting easy repairing of a core by a soldering ron instead of y a torch in case a leak occurs. By staggering the centering loops .on one side of each fin strip relative to those on the opposite side thereof it is possible to make all the fin strips alike from the same dies and still permit of assembling them without'interference of the centering loops on one fin strip with those of another fin strip. 3 i

For the purpose "of preventing the entrance of water from the] headers into theendmost air tubes of theseveral tiers each tube strip of one water tube is connected at its opposite ends with the corresponding ends of the tube strip of another water tube by a locking joint 12, as shown at the upper end of Fig. 1, or by any other suitable means.

Instead of using one radiating fin between adjacent water tubes a greater'number of fins may be employed, for instance, as shown in Fig. 6 two radiating fins 5 are employed in each unit or set which fins en agewith each other and with the wall strlps of the respective tubes. 1

In order to prevent distortion of the metal in forming the centering loops on the radiatmg strips or fins, openings'13 are arranged in these strips on opposite sides .of each loop, these openings beingformed by cutting out or removing the stock of this strip so that one. longitudinal edge -1 4. 0f this loop formsone side of this opening and is spaced from the longitudinal edge- 15 forming the opposite-side of this opening on the adj acent corrugation of the respective strip. 'By this means the loops may .be formed on the radiating stri and bent in a direction oppo site to the direction in which the companion I corrugation is bent without distorting the parts but enabling the same .to be so shaped that the-loo s and corrugations are all uniform and t evenly and properly against 7 other radiating strips and tube strips.

For the purpose of stiffening the radiating strips so as to enable the same tobe handled freely without kinking and also to strengthen the radiator core when the same is completed, eachof the loops-and the corrugations of the radiating strip are beaded or ribbed. As shown in the drawin each of the radiating "strips is preferab y p-rovided on. its corrugations adjacent to the longitudinal edges of the strip with longitudinal beads each of which is made up of a plurality of sections 16, 17 which are formed, respectively, on the summits of the corrugations and on the sloping sidesthereof. Each of the centering loops is also-provided with a longitudinal stifiening bead or rib which is composed of sections 18 and 19, the section 18 being arranged on the summit of each 100 and the sections 19 on the slanting or sloping sides thereof. The bead sections 18, 19 project laterally from the concave sides of the 100 s so as not to interfere with the convex sides thereof engaging with the concave sides of the corrugations of other radiating or tube strips. The bead sections 16 also project toward the concave sides of the summits of the corrugations so that the convex sides of these summits may properly engage the convex sides of the summlts of the corrugations of adjacent tube or radiating strips, but the bead sections 17 of the corrugations may be formed on either side of these membersinasmuch as the same are not required to fit against other parts.

By this means the stiffness of the radiating strips is materially increased which permits of handling the same more freely and rapidly without liability of injuring the same, thereby reducing the cost of manufacture aside from strengthening the radiator core when the parts are assembled.

The stock removed from the radiator strips by forming the openings therein also reduces the amount of material in the core without sacrificing efficiency, this being an important item when a radiator of minimum Weight is required.

I claim as my invention:

A radiator core comprising a plurality of water tubes and a plurality of radiating fins arranged between the several water tubes, each of said tubes being constructed of two corrugated strips of metal and each of said fins being constructed of a single corrugated strip ofmetal, and each of said fin strips being provided on its opposite sides with centering loops which are of substantially the same form in cross section as the corrugations of the water tubes and fin strips and project laterally from the concave faces of its corrugations and engage with the concave faces of the corrugations of adjacent strips and each centering loop being provided with a stiffening bead extending lengthwise of the respective loop.

- JOHN M. FEDDERS. 

